How to Calculate Your Amperage Loads

Allowed Amperage by Controller Model

Controller Model Max Amperage Rating
3 Track Chaser - Model 3TSC-10 10 Amps per receptacle/track
4 Track Chaser - Model 4TSC-18 18 Amps max per receptacle/track
6 Track Chaser - Model 4TSC-18 18 Amps max per receptacle/track
8 Track Chaser - Model 4TSC-18 18 Amps max on at one time. Please see the examples below for a complete explanation.

Formulas & Examples for Calculating Your Display's Amperage

Count or Estimate the Number of Bulbs
When purchasing a programmable controller, there is a base price for the controller, based on the number of tracks (see pricing below).

Insert your numbers into this formula.
Total Number of Bulbs X Bulb Wattage ÷ 110 = Amps Needed

For Rope Light
Total Number of Feet X 7 Watts ÷ 110 = Amps Needed

Example 1:
Let's say the most bulbs that will be plugged into a single track/receptacle is 250 bulbs.
Each bulb is 7 watts.
Your formula would look like this.
250 Bulbs X 7 watts ÷ 110 = 16 Amps

This example would be fine for a 4 Track Chaser, 6 Track Chaser or a 10 Track Chaser, because the load will be less than their max amp rating of 18 amps per track/receptacle. This example would not work for our 3 Track Chaser because it's max load is 10 amps. The animated diagram below that illustrates how a 4 Track Chaser distributes a load.

4 Track Chaser Load
Distribution Example

Example 2:
Let's say you want to use a 3 Track Chaser but your load is 16 amps and over it's max rating of 10 amps. We would recommend a 18 Amp 4 Track Chaser set in 3 Track Chase mode. This is what makes our controllers universal. Our larger chaser controllers can always drop down and perform the same sequences as a smaller controller.

Example 3:
Let's say you have figured that your display will use well over 18 amps. This is easily remedied with a custom programmable controller. Custom Programmables can accommodate any amperage rating.


Important Considerations When Calculating Smart Chaser Amperage

Smart Chaser Controllers
A Smart Chaser has over 100 different chase patterns available. Some of these patterns will turn on more than one track at a time. A Smart Chaser's max Amp rating is 18 Amps on at one time. Therefore it is important to count the number of bulbs that will be on at any one time and add them to the formula. The example below illustrates a setting that will turn on more than one track at a time.

8 Smart Track Tracer
Set in 5 Track Build Up Pattern

The formula for this example display.
Track 1 will turn on 18 bulbs
Track 2 will turn on 18 bulbs
Track 3 will turn on 18 bulbs
Track 4 will turn on 18 bulbs
Track 5 will turn on 18 bulbs
-----------------------------------
Total 90 bulbs on at one time.
Each bulb is 7 watts
90 Bulbs X 7 watts ÷ 110 = 5.73 Amps

This result will be fine because it is less than the 18 Amps max on at one time for a 8 Track Smart Chaser. If your load exceeds the max amp rating then you will need to use a custom programmable controller.


Amperage Details for Different Types of Lightbulbs

Rope Light
7 Watts Per Foot

18 Amp Chaser Controller
Can turn on up to 282 feet per receptacle

Footage X 7 Watts per Foot ÷ 110 Volts = Amps Needed
or
Amps Available X 110 Volts ÷ 7 Watts per Foot = Footage

15.71 Feet = 1 Amp
25 Feet = 1.59 Amps
100 Feet = 6.36 Amps

10 Amp Chaser Controller (Model 3TSC-10)
Can turn on up to 157 feet per receptacle

C7 Bulbs
7 Watts

18 Amp Chaser Controller
Can turn on up to 282 C7 Bulbs per receptacle

Number of Bulbs X Bulb Wattage ÷ 110 Volts = Amps Needed
or
Amps Available X 110 Volts ÷ Bulb Wattage = Number of Bulbs

15.71 C7 Bulbs = 1 Amp
25 C7 Bulbs = 1.59 Amps
100 C7 Bulbs = 6.36 Amps

10 Amp Chaser Controller (Model 3TSC-10)
Can turn on up to 157 C7 Bulbs per receptacle

C9 Bulbs
9 Watts

18 Amp Chaser Controller
Can turn on up to 220 C9 Bulbs per receptacle

Number of Bulbs X Bulb Wattage ÷ 110 Volts = Amps Needed
or
Amps Available X 110 Volts ÷ Bulb Wattage = Number of Bulbs

12.2 C9 Bulbs = 1 Amp
25 C9 Bulbs = 2.04 Amps
100 C9 Bulbs = 8.18 Amps

10 Amp Chaser Controller (Model 3TSC-10)
Can turn on up to 122 C9 Bulbs per receptacle

Mini Lights

300 minis = 1 Amp

10 Amp Chaser Control Box ( Model 3TSC-10 ) can turn on up to 3000 Mini bulbs per receptacle

18 Amp Chaser Control Box can turn on up to 5400 mini bulbs per receptacle